HEWLETT PACKARDBRAND NEW & ORIGINALP/N: RF1-2130-000OZONE FILTERThis is the original and genuine Hewlett Packard ozone filter, not a replacement or generic version.FITS THE FOLLOWING MODELS:HP LaserJet II (HP 33440A)HP LaserJet IID (HP 33447A)HP LaserJet III (HP 33449A)HP LaserJet IIID (HP 33459A)QMS-PS 810REPLACES THE FOLLOWING PART NUMBERS:RA1-4081-CLNRF1-2130-CLNRA1-4081-030